Manual for delta 17-924

The closest I could find is the Delta 40-530 16".

http://documents.dewalt.com/documents/English/Instruction%20Manual/Delta/En%20900621.pdf

Here is a parts diagram for Delta 40-500 type 1

Delta 40 500 Type 1 15 34 Scroll Saw Parts

Here is a parts diagram for Delta 40-500 type 2

Delta 40 500 Type 2 15 34 Scroll Saw Parts

First you might try this link Delta 40 560 Type II Instruction Manual for a free download. I think there may be others.
Though not an instruction manual, this website Delta 40 560 Type 2 16 34 Scroll Saw Parts gives exploded diagrams of the saw.
Finally have a look at the Delta website http://www.deltamachinery.com/ and see if you can find a download there or ask for one.
19.January.2016

Go to the Dewalt Service website at http://servicenet.dewalt.com/ and put your model number in the Find Parts box. Hit search and you'll be presented with a page where you can view or download the parts breakdown or the instruction manual.

You can get the manual on the link below.

http://servicenet.deltaportercable.com/Products/Detail?isId=true&productNumber=40-530&selectedType=9859#

You can download a copy of the Instruction Manual for the Delta 28-150 Bandsaw from the following link:

http://www.mikestools.com/download/Delta-Bandsaw-manuals/28-150.pdf

Hi, I found something on amazon, take a look here: Amazon com Delta scroll saw manual. I hope this was helpful. cheers

The Instruction Manual for the Delta 40-530 Scroll Saw can be found at the following site:

http://servicenet.deltaportercable.com/Products/Detail?isId=true&productNumber=40-530&selectedType=9859

Note there are two types. The model number on your saw will be followed by either -1 or -2. The link above is for the -1 model. The following link is for the -2 model:

http://servicenet.deltaportercable.com/Products/Detail?isId=true&productNumber=40-530&selectedType=9864

Sorry someone has not responded sooner.

Here's a link to download the pdf.
http://www.dewaltservicenet.com/documents/English/Instruction%20Manual/Delta/A15786.pdf

If it doesn't work, start here:
http://www.deltaportercable.com

You will be able to download one from the Dewalt Service Center.
Follow this link: and navigate to the instruction manual:
http://www.dewaltservicenet.com/Products/DocumentView.aspx?productid=43429&typeId=10220&documentId=29540

If that solves your problem, please take the time to rate this post.
Thanks!

http://www.dewaltservicenet.com/documents/English/Instruction%20Manual/Delta/En1346498.pdf